80877921 has 16 divisors (see below), whose sum is σ = 109368000. Its totient is φ = 53157888.

The previous prime is 80877919. The next prime is 80877961. The reversal of 80877921 is 12977808.

It is not a de Polignac number, because 80877921 - 2¹ = 80877919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80877961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130350 + ... + 130968.

It is an arithmetic number, because the mean of its divisors is an integer number (6835500).

Almost surely, 2^80877921 is an apocalyptic number.

It is an amenable number.

80877921 is a deficient number, since it is larger than the sum of its proper divisors (28490079).

80877921 is a wasteful number, since it uses less digits than its factorization.

80877921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 80877921 is about 8993.2152759733. The cubic root of 80877921 is about 432.4573934217.

The spelling of 80877921 in words is "eighty million, eight hundred seventy-seven thousand, nine hundred twenty-one".